华东交通大学学报Issue(2)：13-17,5.
基于恒载零弯矩的大跨曲线连续刚构桥线形分析
Girder Geometry Analysis of Long Span Curved Prestressed Concrete Rigid Frame Bridge Based on Zero Moment under the Dead Load
摘要
Abstract
In view of the complicated problem of the girder geometry construction control caused by coupled bend⁃ing-torsional effect of long span curved prestressed concrete rigid frame bridge, this paper establishes the girder geometry construction control system and puts forward corresponding measures based on zero moment under the dead load by summarizing influencing factors of girder geometry of curved rigid frame bridge. In order to verify the effectiveness, taking Jiuling viaduct bridge in Huichang county of Jiangxi province as an example, which has mid⁃span of 80m and curvature radius of 1200 m, it analyzes new measures including increasing prestressed steel and temporary aided construction by use of stayed-cable tower and traditional design method with the changed curva⁃ture radiuses, and then compares with the methods of finite element. Results show that vertical displacement, the lateral displacement and torsional displacement of the bridge under new measures are much lower than the values of traditional design method, and the problem of the girder geometry construction control of long span curved pre⁃stressed concrete rigid frame bridge can be solved well.关键词
大跨曲线连续刚构桥/恒载零弯矩/有限元法/线形分析Key words
long span curved prestressed concrete rigid frame bridge/zero moment under the dead load/methods of finite element/analysis of girder geometry分类
交通工程引用本文复制引用
陆之光,王飞,任亮..基于恒载零弯矩的大跨曲线连续刚构桥线形分析[J].华东交通大学学报,2015,(2):13-17,5.基金项目
江西省教育厅基金资助项目 （）
